CN200941542Y - Protective breaker for fault electrical arc - Google Patents
Protective breaker for fault electrical arc Download PDFInfo
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- CN200941542Y CN200941542Y CN 200620044208 CN200620044208U CN200941542Y CN 200941542 Y CN200941542 Y CN 200941542Y CN 200620044208 CN200620044208 CN 200620044208 CN 200620044208 U CN200620044208 U CN 200620044208U CN 200941542 Y CN200941542 Y CN 200941542Y
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- electric arc
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Abstract
The utility model discloses a fault arc protection breaker. Which linearly collects current signal and makes correct adjustment about the signal when some part in the electrical circuit produces arc. The technical schemes is that the breaker comprises signal acquisition module with sampling unit in power consumption device, PC control unit, contact switch in incoming end of the grid. The signal sampling module sends signal in the acquisition circuit of the sampling unit to PC control unit. The PC control unit controls open and close of the contact switch, wherein, the current signal sampling transformer in the sampling unit applies hollow inductor. The utility model is applied in power utility fault safety protection device.
Description
Technical field
The utility model relates to a kind of electricity consumption failure safe protective device, relates in particular to a kind of circuit breaker that fault electric arc is protected.
Background technology
Existing electricity consumption failure protecting device; be divided into ground-fault interrupter (Ground-fault CircuitInterrupter), leakage current detection breaker (Leakage Current Detector Interrupter) and fault electric arc breaker protector (Arc-Fault Circuit Interrupter) etc.
Ground-fault interrupter (GFCI) is mainly used to the protective earthing fault, and when live wire in the electrical equipment or zero line had electric current to flow through over the ground, GFCI can move, and cuts off the electricity supply.This protector is mainly used in and prevents that the people from taking place to take place if any the electric shock phenomenon when making electrical appliance, and in time deenergization prevents the human electric shock.
Leakage current detection breaker (LCDI) is mainly used to prevent the fire that generation electric arc causes on the power line that connects, and when on the power line electric arc taking place, because the special protector on the lead can make circuit breaker disconnect, prevents that electric arc from causing fire.
Fault electric arc breaker protector (AFCI) is mainly used in the detection of arc fault; not only can be to the wrong arc-detection on the lead; and when the electrical appliance part generation electric arc beyond the lead; AFCI is by the detection to current signal in the circuit; judge identification error electric arc and normal arc; when the fault electric arc that might cause fire took place in circuit, AFCI in time cut off circuit, prevented that fire from taking place.
Fig. 1 shows the functional module of an embodiment of fault electric arc protective circuit breaker in the prior art.See also shown in Figure 1ly, this circuit breaker mainly is made up of contact switch 1, microcomputer control unit 2 and signal sampling module 3.Wherein contact switch 1 is arranged on electrical network one end of power line 4, is used to control the turn-on and turn-off of power line 4, and signal sampling module 3 is arranged on power consumption equipment one end of power line 4.Signal sampling module 3 is gathered coherent signals when having electric arc to occur in the circuit, and delivers to microcomputer control unit 2 and handle, and microcomputer control unit 2 sends triggering signal and gives contact switch 1 so that its disconnection when electric arc is fault electric arc.This contact switch 1 can be the contact switch of electromagnetism trigger-type.
Be connected in series sampling unit 31, bandpass filtering unit 32, amplifying unit 33 and integral unit 34 successively in signal sampling module 3 inside.Wherein sampling unit 31 is connected power consumption equipment one end of power line 4, and the output of integral unit 34 connects microcomputer control unit 2.The high-frequency current signal that sampling unit 31 is gathered in the power line 4, the high-frequency current signal that collects becomes the signal of the needed frequency range of system behind bandpass filtering unit 32, become the signal of the utilizable desirable amplitude of system after this frequency band signals amplifies through amplifying unit 33, integral unit 34 is imported microcomputer control unit 2 after this signal is done integral processing.Through above-mentioned processing, microcomputer control unit 2 can detect the operation conditions of power circuit in real time, and when abnormality occurred, microcomputer control unit 2 was judged that according to the characteristics of signal the abnormality that is occurred is normal arc or fault electric arc.If fault electric arc, then microcomputer control unit 2 sends triggering signal, by the electromagnetism trigger contact switch is disconnected, thereby avoids fault electric arc to cause harm such as fire.
Fig. 2 shows the functional module of another embodiment of fault electric arc protective circuit breaker in the prior art.As shown in Figure 2, present embodiment and Fig. 1 embodiment are basic identical, unique difference is, the order of amplifying unit 33 ' and bandpass filtering unit 32 ' processing signals is exchanged, promptly utilize amplifying unit 33 ' that the current signal that collects is amplified earlier, utilize bandpass filtering unit 32 ' that the conversion of signals after amplifying is become the needed frequency band signals of system again.Such modular structure can realize above-mentioned functions equally.
To sum up, when AFCI detects current signal, need to gather the current signal of peculiar frequency range when electric arc takes place.And prior art adopts magnetic conductive material to make the current sensor of magnetic core.This current acquisition mode is unfavorable for the correct judgement of signal because of the saturation characteristic of magnetic material causes the non-linear of signal.
Summary of the invention
The purpose of this utility model is to address the above problem, and a kind of fault electric arc protective circuit breaker is provided, and when in the circuit during any part generation electric arc, can linearly gather current signal, helps signal is made correct judgement.
The technical solution of the utility model is: a kind of fault electric arc protective circuit breaker; comprise that the inside that is installed in the power consumption equipment end is provided with signal sampling module, the microcomputer control unit of sampling unit, is installed in the contact switch of electrical network end of incoming cables; described signal sampling module is utilized the signal in the described sampling unit Acquisition Circuit to send into described microcomputer control unit and is handled; described microcomputer control unit is controlled the switching of described contact switch; wherein, the current signal of described sampling unit sampling transformer adopting air core inductor.
Above-mentioned fault electric arc protective circuit breaker; wherein; described signal sampling module further comprises bandpass filtering unit, amplifying unit and the integral unit that is connected in series successively with described sampling unit; described bandpass filtering unit converts the current signal that collects to system required frequency band signals; described amplifying unit amplifies described frequency band signals, and described integral unit is imported described microcomputer control unit after the frequency band signals after amplifying is done integral processing.
Above-mentioned fault electric arc protective circuit breaker; wherein; described signal sampling module further comprises amplifying unit, bandpass filtering unit and the integral unit that is connected in series successively with described sampling unit; described amplifying unit amplifies the current signal that collects; current signal after described bandpass filtering unit will amplify converts the required frequency band signals of system to, and described integral unit is imported described microcomputer control unit after the frequency band signals after amplifying is done integral processing.
Above-mentioned fault electric arc protective circuit breaker, wherein, described contact switch is the contact switch of Electromagnetic Control.
Above-mentioned fault electric arc protective circuit breaker, wherein, in the described air core inductor, its skeleton adopts nonmagnetic substance, does not add magnetic core in the skeleton.
Above-mentioned fault electric arc protective circuit breaker, wherein, in the described air core inductor, its skeleton adopts nonmagnetic substance, and the hollow space of this skeleton is equipped with the magnetic core that adopts nonmagnetic substance.
Above-mentioned fault electric arc protective circuit breaker, wherein, described inductance range is that 0.01 microhenry is to 500 microhenrys.
The utility model contrast prior art has following beneficial effect: circuit breaker of the present utility model is connected between power consumption equipment and the electrical network by the form of plug or socket.When but the fault electric arc of fire hazard takes place because of reasons such as electric wire are aging in power consumption equipment, this circuit breaker removes voltage or the electric current of acquisition stream through power consumption equipment by the current signal sampling transformer of the air core inductor of nonmagnetic substance skeleton, detect fault electric arc, and triggering electric shock switch makes circuit breaker, thereby in time extinguish fault electric arc, prevent fault generations such as fire.
Description of drawings
Fig. 1 is the functional block diagram of an embodiment of fault electric arc protective circuit breaker of prior art.
Fig. 2 is the functional block diagram of another embodiment of fault electric arc protective circuit breaker of prior art.
Fig. 3 is the three-dimensional structure diagram of air core inductor one preferred embodiment of the sampling unit transformer in the utility model fault electric arc protective circuit breaker.
Fig. 4 is a cutaway view embodiment illustrated in fig. 3.
Fig. 5 is the three-dimensional structure diagram of another preferred embodiment of air core inductor of the sampling unit transformer in the utility model fault electric arc protective circuit breaker.
Fig. 6 is a cutaway view embodiment illustrated in fig. 5.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
The former limit 5-10 of sampling transformer pricks copper cash on the sampling inductance of secondary, and the sampling inductance in the utility model adopts air core inductor.
In the common inductance, its coil is wrapped on the skeleton, and skeleton hollow is equipped with magnetic core in it, and wherein magnetic core adopts magnetic material to make.Fig. 3 shows the structure of an embodiment of current signal sampling inductance in the sampling unit of the present utility model.Fig. 4 is the cutaway view of Fig. 3.As shown in Figure 3 and Figure 4, inductance is made up of coil 41, skeleton 42 and magnetic core 43, and than traditional inductance, its skeleton 42 and magnetic core 43 all adopt nonmagnetic substance, for example wooden unit, plastics etc.
Fig. 5 shows the structure of another embodiment of current signal sampling inductance in the sampling unit of the present utility model.Fig. 6 is the cutaway view of Fig. 5.As shown in Figure 5 and Figure 6, inductance is made up of coil 51 and skeleton 52, and than traditional inductance, its skeleton 52 adopts nonmagnetic substance, and does not wherein adorn magnetic core.
The structure of above-mentioned two embodiment all can make inductance value enough little, makes inductance range reach 0.01 microhenry to 500 microhenrys.Because only under the enough little situation of inductance value, could guarantee to collect high-frequency signal trickle in the circuit, guarantee the line acquisition current signal, thereby be convenient to handle with testing circuit in abnormality.Should be understood that inventive point of the present utility model is to adopt the induction structure of the foregoing description to make inductance value enough little, embodiment only is used for example.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; being familiar with those of ordinary skill in the art can be under the situation that does not break away from invention thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (7)
1 one kinds of fault electric arc protective circuit breakers; comprise that the inside that is installed in the power consumption equipment end is provided with signal sampling module, the microcomputer control unit of sampling unit, is installed in the contact switch of electrical network end of incoming cables; described signal sampling module is utilized the signal in the described sampling unit Acquisition Circuit to send into described microcomputer control unit and is handled; described microcomputer control unit is controlled the switching of described contact switch; it is characterized in that the current signal sampling transformer adopting air core inductor of described sampling unit.
2 fault electric arc protective circuit breakers according to claim 1; it is characterized in that; described signal sampling module further comprises bandpass filtering unit, amplifying unit and the integral unit that is connected in series successively with described sampling unit; described bandpass filtering unit converts the current signal that collects to system required frequency band signals; described amplifying unit amplifies described frequency band signals, and described integral unit is imported described microcomputer control unit after the frequency band signals after amplifying is done integral processing.
3 fault electric arc protective circuit breakers according to claim 1; it is characterized in that; described signal sampling module further comprises amplifying unit, bandpass filtering unit and the integral unit that is connected in series successively with described sampling unit; described amplifying unit amplifies the current signal that collects; current signal after described bandpass filtering unit will amplify converts the required frequency band signals of system to, and described integral unit is imported described microcomputer control unit after the frequency band signals after amplifying is done integral processing.
4 fault electric arc protective circuit breakers according to claim 1 is characterized in that described contact switch is the contact switch of Electromagnetic Control.
5 fault electric arc protective circuit breakers according to claim 1 is characterized in that, in the described air core inductor, its skeleton adopts nonmagnetic substance, does not add magnetic core in the skeleton.
6 fault electric arc protective circuit breakers according to claim 1 is characterized in that, in the described air core inductor, its skeleton adopts nonmagnetic substance, and the hollow space of this skeleton is equipped with the magnetic core that adopts nonmagnetic substance.
7 fault electric arc protective circuit breakers according to claim 1 is characterized in that, described inductance range is that 0.01 microhenry is to 500 microhenrys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620044208 CN200941542Y (en) | 2006-07-25 | 2006-07-25 | Protective breaker for fault electrical arc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620044208 CN200941542Y (en) | 2006-07-25 | 2006-07-25 | Protective breaker for fault electrical arc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200941542Y true CN200941542Y (en) | 2007-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620044208 Expired - Fee Related CN200941542Y (en) | 2006-07-25 | 2006-07-25 | Protective breaker for fault electrical arc |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200941542Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752846B (en) * | 2008-12-03 | 2011-12-14 | 郭鸿 | Arc short-circuit protection device and control method |
| CN101764387B (en) * | 2008-12-22 | 2014-08-13 | 通用电气公司 | Arc detection using detailed and approximate coefficients from discrete wavelet transforms |
-
2006
- 2006-07-25 CN CN 200620044208 patent/CN200941542Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752846B (en) * | 2008-12-03 | 2011-12-14 | 郭鸿 | Arc short-circuit protection device and control method |
| CN101764387B (en) * | 2008-12-22 | 2014-08-13 | 通用电气公司 | Arc detection using detailed and approximate coefficients from discrete wavelet transforms |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 Termination date: 20100725 |